The wrong way?

I use iA Writer as my goto Markdown editor & I highly recommend it. I find it odd however that in their non-pro version of the software (at least), adding images isn’t readily accessible. Furthermore, their online documentation gives an erroneous description on how to do this:

Currently only web-accessible image URLs are supported. On export to RTF or .docx, currently the image’s alt text is added, but the image is not embedded. You can add images via the following syntax: